At Watkins Glen, Andretti put his Lotus 79 on the pole before a record crowd of over 150,000 fans, but Ferrari's Carlos Reutemann completed a sweep of the two United States races in 1978 by finishing 19 seconds ahead of Australian Alan Jones.

The GPDA filed an injunction to bar Patrese from participating in the 1978 United States Grand Prix weekend, which was allowed.

Patrese, who believed that he was not to blame for the fatal accident at Monza, was furious at this action taken, and he tried unsuccessfully to stop the race from taking place.

He later lowered that to 1:38.92, ahead of the Ferraris of Reutemann and Canadian rookie Gilles Villeneuve, then the two Brabhams of Niki Lauda and John Watson.

American Brett Lunger, about to drive in his last Formula One race, was at the wheel of an Ensign for the first time, after his McLaren was damaged in the opening lap crash at Monza that claimed the life of Peterson.

Bobby Rahal had been enlisted from Formula Atlantic to partner Jody Scheckter, as Canadian Walter Wolf was running two cars for the first time.

Starting carefully in his first F1 drive, Rahal took more than a second off his lap time in the Friday afternoon session, then another half-second on Saturday and qualified 20th.

On the last lap of the morning warm-up, the rear stub axle on Andretti's Lotus broke in the left-hander entering The Anvil (nicknamed "Ickx's Corner" after a crash the Belgian had there in 1976).

Reutemann came home almost twenty seconds ahead of Jones to take the eighth Grand Prix win of his career, the third in the US.